How do I measure how many amps my 13 volt power supply is producing for my ham radio

Depends on which 13volt supply you mean and of course the model number of the set.

Amps is measured in-line with 1 of the power leads with an amp or multimeter meter in the amps mode, paying particular attention to the polarity of them. When in Amps mode do NOT use the meter to measure voltage or you will blow the internal fuse or ruin the meter.
BTW, 1 wire has to be cut or disconnected and the meter is placed in series with it allowing the meter to complete the circuit. Another way is to just calculate the amps using a formula if that is required.
Usually if you are having a laptop /power supply issue just check the voltage of the power supply.

Good Luck!
Rich Lilja

The computer's switch mode power supply produces DC (direct current) electricity.

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You won't damage anything with 12 volts. Equipment built for use in automobiles will often have a DC input marked 13.8 volts because it's the voltage delivered by a fully-charged battery. But any supply around 12 volts will work. Just be sure the supply has enough current available (around an amp should be fine for a scanner), and that you get the polarity right when connecting it.

Well here is a way to check your power supply, on your hard drive connector using your volt meter and measuring from ground. this would be using one of two middle connectors it should measure +5 VDC on the red wire and + 12 VDC on the yellow wire. If these voltages are good then we got to see if the power supply is producing the -12VDC voltage. This voltage is ussed by the syustemboard on pin 14 of a 24 pin power supply. I would recommend not having your system board plugged in while measuring these votlages, but the power supply may need a load, I would plug in the cdrom.. Below are a couple of picture to explain this and a link to a website that has this documented.

http://www.playtool.com/pages/psuconnectors/connectors.html

The 24 pin main power connector was added in ATX12V 2.0 to provide extra power needed by PCI Express slots. The older 20 pin main power cable only has one 12 volt line. The new 24 pin connector added one line apiece for ground, 3.3, 5, and 12 volts. The extra pins made the auxiliary power cable unnecessary so most ATX12V 2.x power supplies don't have them. The 24 pin connector is polarized so it can only be plugged in pointing in the correct direction.
Pinout Pins 1 through 12 Pins 13 through 24 Description Wire color Pin number Pin number Wire color Description +3.3 volts orange 1 13 orange +3.3 volts +3.3 volts orange 2 14 blue -12 volts ground black 3 15 black ground +5 volts red 4 16 green PS_ON# ground black 5 17 black ground +5 volts red 6 18 black ground ground black 7 19 black ground PWR_OK gray 8 20 white -5 volts (optional) VSB +5 volts purple 9 21 red +5 volts +12 volts yellow 10 22 red +5 volts +12 volts yellow 11 23 red +5 volts +3.3 volts orange 12 24 black ground
Good Luck I hope this helps.

My Ionic Breeze would work for a short time after cleaning and the blue light would start flashing and the unit would stop working. I checked the wall cube power adapter with a volt meter. It was putting out only 10 volts instead of the needed 12 volts. It seems The Ionic Breeze needs a full 12-13 volts to work. So I went to Radio Shack and bought a universal 12 volt 800ma power adapter. I checked the voltage in the new adapter, it was 13 volts. This fixed the flashing blue light problem. However the Ionic Breeze produces harmful Ozone gas, so I don't use it anymore.

Unplug the PS-15KX 120V AC cord !! Then take cover off. DO NOT plug the AC cord in unless you are used to working around a lethal voltage and current !!!!!!!!!!

If you can use a Multimeter, then measure resistance across each pair of the 3 leads of the output transistors. You will probably find fractions of an ohm across a pair of leads. One or both may be shorted. NOTE: Do not ever measure resistance in a powered up circuit, kiss meter bye-bye and maybe burn you too.

By putting more robust transistors in this supply, you may not gain much reliability. The supply is rated at a continuous current draw, which is less than the intermittent current they advertise. Read the spec's of any power supply you get and look for continuous current ability.

There are several better transistors that will substitute for the 2N3055. You will need to look at a transistor substitution book and check specs. The internet is great for this. I used to use all kinds of data books, and still have them! But looking up info on-line is nice. Motorola has some that will fit and have higher current and voltage ratings,

Get someone who is a ham or geek if you aren't sure about sticking your fingers in the power supply.

Be Careful, Work Safe, it is a factor of longer life.

"voltage regulator module" thats have next to core voltage connector it's supply to cpu
cpu need 2 volt 45 amp and our power supply can produce voltage 12 volt 3 amp so motherboard can produce more amp for cpu . 6 mosfet using for this process it's near by cpu

To use supply the radio with 12 volts you would have to use a power supply such as an Astron which can be purchased at Ham Radio Outlet and other ham radio shops, you can get their number on the internet. The 110 AC to 12 volt DC is not the problem..it requires the amperage to make the radiois work.... You can use a 12 volt battery and use it for a maybe an hour without charging....the radio will not work with a car battery charger... Hope this helps